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Old 05-19-2017, 04:19 PM   #1
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non-blocking sockets & tcp retransmissions

I'm currently having an issue with a stuck TCP connection. After tcpdumping the interface I noticed that there are no re-transmissions for unacked packets. I would expect to see retramissions if the packets are not acked within some multiple of the RTT.

The application that is not retransmitting is using non-blocking sockets. When does the kernel trigger the retransmission logic on a non-blocking socket? Should it happen automatically, or only the next time send() is called?

Old 05-22-2017, 04:39 PM   #2
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Non blocking socket isn't relative to TCP retransmission.


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